National Security Adviser John Brennan, the president's chief counterterrorism adviser.

Washington (CNN) - The Obama administration unveils its National Security Strategy on Thursday and it will be the first time a president explicitly recognizes the threat posed to the country by radicalized individuals at home, the president's chief counterterrorism adviser said.

The security strategy acts as a blueprint for how a White House administration intends to protect Americans. In the past, it has focused mostly on international threats.

But a spate of terror-related plots in the United States recently prompted the Obama administration to include homegrown terrorism in the document, National Security Adviser John Brennan said Wednesday.

Homegrown terrorism represents a new phase of the terrorist threat, he said.